Nov. ao, 1916 Determination of Hygroscopic Coefficients of Soils 
353 
hygroscopic moisture is reported in Table VII. The triplicate determi¬ 
nations were concordant, in most instances differing by less than 0.2 per 
cent. The ratio of the hygroscopic coefficient to the found hygroscopic 
moisture (Table VII) shows an average of 2.71 and, with the exception 
of the first foot at Hastings and the fourth at Wauneta, lies between 2.38 
and 2.96, a range of less than 25 per cent. 
TABLE VII .—Hygroscopic moisture in a series of air-dried loess soils and its relation to 
the hygroscopic coefficient in these soils 
HYGROSCOPIC MOISTURE 
Depth. 
Wauneta. 
McCook. 
Holdredge. 
Hastings. 
Lincoln. 
Weeping 
Water. 
Average. 
Foot . 
P . ct . 
P. a . 
P. ct . 
P . ct . 
P. cf. 
P. cf. 
P. cf. 
I. 
3 - I 
3*5 
3*8 
3 * 0 
4.2 
4. I 
3*6 
2. 
3*4 
4.0 
4-7 
4.2 
5*5 
4*9 
4.4 
3 * * *. 
3*4 
3*7 
4-7 
4. 6 
5*4 
5 *o 
4.4 
4 . 
3*3 
3*4 
4-3 
4-3 
5 * 0 
4*9 
4.2 
5 . 
3*2 
3-2 
4.0 
4.1 
4*9 
4*8 
4.0 
6. 
2. 8 
3*2 
3-8 
4.2 
4.8 
4*7 
3*9 
Average.. 
3*2 
3*5 
4 - 2 
4. 1 
5 *o 
4 * 7 
4. 1 
RATIO OF HYGROSCOPIC COEFFICIENT TO HYGROSCOPIC 
MOISTURE 
I. 
2. 93 
2. 86 
2. 66 
3. 20 
2. 86 
2 .95 
2. 91 
2. 
2. 82 
2. 72 
2. 38 
2. 76 
2. 62 
2. 80 
2.68 
3 . 
2. 85 
2. 89 
2. 40 
2. 70 
2. 52 
2. 78 
2. 69 
4 .. 
3. 00 
2.85 
2.38 
2.58 
2. 60 
2. 65 
2. 68 
5 . 
2. 81 
2. 93 
2. 40 
2. 61 
2. 61 
2. 62 
2. 66 
6... 
2. 96 
2. 84 
2.47 
2. 60 
2. 64 
2. 66 
2. 69 
Average.. 
2. 91 
0 
00 
oi 
2. 45 
2. 70 
2. 62 
2. 76 
2. 7L 
CALCULATED HYGROSCOPIC COEFFICIENT a 
1. 
8.4 
9 * 5 
10.3 
8. 1 
11. 4 
11.1 
9.8 
2... 
9.2 
10. 8 
12. 7 
11. 4 
14.9 
i 3*3 
12. 0 
3 . 
9.2 
10. 0 
12. 7 
12. 5 
14. 6 
13. 6 
12. 1 
4 . 
8.9 
9.2 
11. y 
11. 7 
13. 6 
13*3 
11. 4 
5 . 
8.7 
8.7 
10. 8 
11.1 
I 3 - 3 
13.° 
10. 9 
6. 
7*3 
8*7 
10.3 
11. 4 
13. 0 
12. 7 
10. 6 
Average. . 
8.7 
9 r 5 
11. 4 
11.1 
13. 6 
12. 7 
11. 2 
DEPARTURE OF CALCULATED FROM DETERMINED 
HYGROSCOPIC COEFFICIENT 
I. 
-0. 7 
—0. 2 
0. 2 
“ 1*5 
— O. 6 
— 1. 0 
-0.7 
2... 
- *4 
— . I 
i* 5 
— . 2 
* 5 
- .4 
. 1 
3 . 
- *5 
- *7 
1.4 
. 1 
1. 0 
•4 
. 2 
4 . 
— 1. 0 
~ • 5 
i *5 
.6 
.6 
- *3 
*3 
5 . 
~ *3 
- *4 
1. 2 
•4 
•5 
“ *4 
•3 
6 . 
— 1. 0 
- *4 
•9 
• 7 
•4 
— . 2 
. 1 
Average.. 
- .6 
- *4 
1. 1 
. 1 
• 5 
“ *3 
. 1 
a Using ratio found with control soils H and S. 
